Changed the last fix to instead return the correct number of chunks in clang::CompletionString::get_num_chunks().

src/CompletionString.cc

@@ -7,17 +7,22 @@ CompletionString(const CXCompletionString &str) {
 
 int clang::CompletionString::
 get_num_chunks() {
+  if (clang_getCompletionAvailability(str_) == CXAvailability_Available)
     return clang_getNumCompletionChunks(str_);
+  else
+    return 0;
 }
 
 std::vector<clang::CompletionChunk> clang::CompletionString::
 get_chunks() {
   std::vector<clang::CompletionChunk> res;
+  if (clang_getCompletionAvailability(str_) == CXAvailability_Available) {
     for (auto i = 0; i < get_num_chunks(); i++) {
       res.emplace_back(clang_getCString(clang_getCompletionChunkText(str_, i)),
 		       static_cast<CompletionChunkKind>
 		       (clang_getCompletionChunkKind(str_, i)));
     }
+  }
   return res;
 }